Michael Morse swats his 13th homer of the season in the second inning off Cincinnati's Mike Leake to give the Giants a 2-1 lead.

Photo: Joe Robbins, Getty Images

Michael Morse swats his 13th homer of the season in the second...

Image 2 of 4

Pablo Sandoval's three singles made him 11-for-17 against Mike Leake.

Photo: Joe Robbins, Getty Images

Pablo Sandoval's three singles made him 11-for-17 against Mike Leake.

Image 3 of 4

Madison Bumgarner wipes off his arm after finishing eight innings of work en route to his eighth victory of the year.

Photo: Al Behrman, Associated Press

Madison Bumgarner wipes off his arm after finishing eight innings...

Image 4 of 4

Angel Pagan of the San Francisco Giants tosses his batting helmet after the final out of the third inning of the game against the Cincinnati Reds at Great American Ball Park on June 5, 2014 in Cincinnati, Ohio. The Giants won 6-1.

- The Dodgers' manager admitted his fractured team is playing like doo-doo. The Rockies have fallen below .500. The Padres and Diamondbacks do not seem equipped for a run in 2014.

So the questions become, will the Giants' biggest competition over the final 101 games (plus half a suspended game) be themselves? Can they coast to their third National League West title in five years as long as they do not shoot themselves in the foot?

So much can happen in four months, especially injuries, which can level a playing field tout suite. But the Giants continue to give no quarter and show few vulnerabilities.

Here is a scarier thought for the rest of the West: After beating the Reds 6-1 on Thursday to complete a 5-2 trip, the Giants play 20 of their next 25 games at home, a chance to consolidate their gains after moving 18 games over .500 for the first time at 39-21.

The numbers are a fun read for the faithful, but manager Bruce Bochy would rather his players not know the Giants' record, or that they own the largest division lead by far at 8 1/2 games.

"There's so much baseball left," Bochy said. "That's the last thing I want anybody to talk about or want to talk about. It's early June here. There's no point talking about where we are at this stage of the game."

Winning series at Great American Ball Park had been difficult for the Giants. They had not done it in the regular season since 2009 before they overcame the game they butchered Tuesday night to take the final two.

Hunter Pence also made a great, critical catch to start the bottom of the first inning, flying toward the gap and diving to stop what would have been a Billy Hamilton triple - at least. Hamilton could not steal or draw an errant throw because he was 0-for-4.

"We definitely wanted to keep him off the bases," Bumgarner said of Hamilton. "He made us look bad the last couple of games."

Bumgarner (8-3) spotted the Reds a 1-0 lead when the next hitter, Todd Frazier, hit a flyball that drifted into the right-field seats. But after that the big left-hander rolled in his first start as the reigning National League Pitcher of the Month.

He retired his final 16 hitters after Frazier's third-inning single. As Crawford put it, "He pitched like it was still May."

Bumgarner's only real misfires came at the plate, where he was 0-for-4 with three strikeouts. A huge cheer rose after the third strikeout, which earned all the fans a free pizza.

"That's good," Bumgarner said. "I always like for people to eat pizza."

Bumgarner had a 2-1 lead after Morse hit his 13th homer in the second inning and a 5-1 lead after Crawford hit his seventh homer in the fourth. Both rallies began with singles by Pablo Sandoval, now 11-for-17 against Leake. Tyler Colvin also hits Leake well and singled ahead of Crawford's shot.

That's 68 homers in 61 games for the Giants, who get to display their wares for the home fans a lot over the next several weeks.

Baseball draft

Giants and A's both take college players with first-round picks; USF's Zimmer goes 21st to Indians. B3

On a roll

The Giants return to AT&T Park on Friday after a 5-2 road trip that pushed their NL West lead to 8 1/2 games going into a stretch in which they will play 20 of 25 at home.

Fast 60: The Giants are 39-21, their best 60-game start since moving to AT&T Park in 2000.

Home cooking: San Francisco is an MLB-best 19-9 at home - on pace to win 54 of its 81 home games. In the Giants' world championship seasons, they won 49 (2010) and 48 (2012) of the games they hosted.

Soft spot? The next six teams to visit San Francisco - Mets, Nationals, Rockies, Padres, Reds and Cardinals - are a combined 19 games under .500 on the road (79-98).